I've also got a 50D and, rather dimly, bought the App without checking the list of supported cameras. When I tried it, it didn't work. Surprise surprise. Finding the 50D wasn't supported, I contacted the app website, Dire Studio, and asked if they had any plans to support the 50D retrospectively. Apparently they have but need some beta testing. I'm going to have a go at helping out. I'm sure they would be glad to hear from other 50D owners who'd also like to help.

The app appears to work fine. I used it on my 7D, 5D2, 5D3 and 1DX. However, since my 1DX is fairly new, I know the exact count from looking at my file name sequence. This app is underestimating by about 1000 shots. However, even the built in shutter count on the 1DX is not reading properly. My real file count is 4400, the app reports around 3500 and the 1DX menu shows <4000 so obviously even the internal count isn't right and that is what the program reads. However, as a general measure it seems to be fairly accurate probably reading the camera correctly but it seems the camera itself doesn't store the data accurately.

I've also got a 50D and, rather dimly, bought the App without checking the list of supported cameras. When I tried it, it didn't work. Surprise surprise. Finding the 50D wasn't supported, I contacted the app website, Dire Studio, and asked if they had any plans to support the 50D retrospectively. Apparently they have but need some beta testing. I'm going to have a go at helping out. I'm sure they would be glad to hear from other 50D owners who'd also like to help.

I also requested 50D support to them on another forum... so it looks like they are aware of the 50D interest.

I've also got a 50D and, rather dimly, bought the App without checking the list of supported cameras. When I tried it, it didn't work. Surprise surprise. Finding the 50D wasn't supported, I contacted the app website, Dire Studio, and asked if they had any plans to support the 50D retrospectively. Apparently they have but need some beta testing. I'm going to have a go at helping out. I'm sure they would be glad to hear from other 50D owners who'd also like to help.

Glad to hear there's a few other 50D users wanting support. I know a few people that would like it too. I'll shoot them an email so they know there's more interest.

The app appears to work fine. I used it on my 7D, 5D2, 5D3 and 1DX. However, since my 1DX is fairly new, I know the exact count from looking at my file name sequence. This app is underestimating by about 1000 shots. However, even the built in shutter count on the 1DX is not reading properly. My real file count is 4400, the app reports around 3500 and the 1DX menu shows <4000 so obviously even the internal count isn't right and that is what the program reads. However, as a general measure it seems to be fairly accurate probably reading the camera correctly but it seems the camera itself doesn't store the data accurately.

Hi,

The cause of your shutter count discrepancy is how Canon's firmware counts actuations. There are two numbers: a non-volatile count and a session (volatile) count (a session is the time interval between power-offs). What we display is the non-volatile count. When you power on the camera the session count is zeroed. It is incremented during the session and added to the non-volatile count when you turn the power off. If power gets cut abruptly, then the camera fails to do a proper shutdown and will not add the session count to the non-volatile count - resulting in "missing" shots.

When you remove the battery the first thing the camera does after detecting that the battery door is open is to shut itself down properly. The time it takes to fully open the door is usually enough for the shutdown. So it's hard to cause an abrupt power cut this way. But when the battery runs too low during shooting, it might not provide enough power for a proper shutdown. Or the easiest way to reproduce this phenomenon is to power the camera with a DC adapter and just pull the plug.

The app appears to work fine. I used it on my 7D, 5D2, 5D3 and 1DX. However, since my 1DX is fairly new, I know the exact count from looking at my file name sequence. This app is underestimating by about 1000 shots. However, even the built in shutter count on the 1DX is not reading properly. My real file count is 4400, the app reports around 3500 and the 1DX menu shows <4000 so obviously even the internal count isn't right and that is what the program reads. However, as a general measure it seems to be fairly accurate probably reading the camera correctly but it seems the camera itself doesn't store the data accurately.

Hi,

The cause of your shutter count discrepancy is how Canon's firmware counts actuations. There are two numbers: a non-volatile count and a session (volatile) count (a session is the time interval between power-offs). What we display is the non-volatile count. When you power on the camera the session count is zeroed. It is incremented during the session and added to the non-volatile count when you turn the power off. If power gets cut abruptly, then the camera fails to do a proper shutdown and will not add the session count to the non-volatile count - resulting in "missing" shots.

When you remove the battery the first thing the camera does after detecting that the battery door is open is to shut itself down properly. The time it takes to fully open the door is usually enough for the shutdown. So it's hard to cause an abrupt power cut this way. But when the battery runs too low during shooting, it might not provide enough power for a proper shutdown. Or the easiest way to reproduce this phenomenon is to power the camera with a DC adapter and just pull the plug.